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IBM Elastic Storage System 5000 Series Hardware Manual

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IBM Elastic Storage System 5000
Version 6.0.1
Model 092 Hardware Guide
IBM
SC28-3135-00

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  Summary of Contents for IBM Elastic Storage System 5000 Series

  • Page 1 IBM Elastic Storage System 5000 Version 6.0.1 Model 092 Hardware Guide SC28-3135-00...
  • Page 2 IBM welcomes your comments; see the topic “How to submit your comments” on page xiii. When you send information to IBM, you grant IBM a nonexclusive right to use or distribute the information in any way it believes appropriate without incurring any obligation to you.
  • Page 3: Table Of Contents

    Contents Figures........................v Tables........................ix About this information..................xi Who should read this information.......................xi IBM Elastic Storage System information units................... xi Related information............................xii Conventions used in this information......................xii How to submit your comments......................... xiii Chapter 1. Notices....................1 Trademarks..............................2 Homologation statement..........................
  • Page 4 Checklist: Unpacking and installing Model 092 expansion enclosure............. 39 External parts of the Model 092 expansion enclosure................42 Removing the top cover..........................44 Installing or replacing the support rails (IBM SSR task)................45 Installing or replacing the fascia....................... 48 Installing or replacing a drive........................49 Installing or replacing the top cover......................
  • Page 5: Figures

    Figures 1. Model 092 expansion enclosure.........................19 2. ESS 5000 with Model 092 expansion enclosure..................20 3. Model 092 expansion enclosure rear view....................21 4. Drive locations of Model 092 expansion enclosure................... 21 5. Front and rear view of Model 092 expansion enclosure................24 6.
  • Page 6 24. Screw locations to attach the inner rail to the enclosure................ 46 25. Attaching the inner rail section to the enclosure..................46 26. Installing the rail assembly to the rack frame..................47 27. Example of the required rack space......................47 28. Fascia components on the expansion enclosure ..................48 29.
  • Page 7 49. SAS cable correctly inserted into the SAS port ..................61 50. SAS cable connector orientation......................62 51. Features on the front of the Model 092 expansion enclosure..............62 52. Secure power cables ..........................63 53. Power and SAS cable connections on the back of the enclosure ............64 54.
  • Page 8 viii...
  • Page 9: Tables

    Tables 1. Conventions..............................xii 2. Weight of expansion enclosure parts......................15 3. Weight of expansion enclosure drives......................16 4. Enclosure weight as FRUs are installed..................... 16 5. Power cord feature codes........................... 25 6. Power specifications per power supply......................27 7. Power consumption examples per enclosure.................... 28 8.
  • Page 10 24. Enclosure models and rack requirements....................74...
  • Page 11: About This Information

    This information is intended for administrators of IBM Elastic Storage System (ESS) that includes IBM Spectrum Scale RAID. IBM Elastic Storage System information units IBM Elastic Storage System (ESS) 5000 documentation consists of the following information units. Information unit Type of information Intended users...
  • Page 12: Related Information

    Enter. In command examples, a backslash indicates that the command or coding example continues on the next line. For example: mkcondition -r IBM.FileSystem -e "PercentTotUsed > 90" \ -E "PercentTotUsed < 85" -m p "FileSystem space used" {item} Braces enclose a list from which you must choose an item in format and syntax descriptions.
  • Page 13: How To Submit Your Comments

    In the left margin of the document, vertical lines indicate technical changes to the information. How to submit your comments To contact the IBM Spectrum Scale development organization, send your comments to the following email address: scale@us.ibm.com About this information xiii...
  • Page 14 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 15: Chapter 1. Notices

    Consult your local IBM representative for information on the products and services currently available in your area. Any reference to an IBM product, program, or service is not intended to state or imply that only that IBM product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any IBM intellectual property right may be used instead.
  • Page 16: Trademarks

    International Business Machines Corp., registered in many jurisdictions worldwide. Other product and service names might be trademarks of IBM or other companies. A current list of IBM trademarks is available on the web at Copyright and trademark information at www.ibm.com/legal/copytrade.shtml.
  • Page 17: Homologation Statement

    DANGER: A danger notice indicates the presence of a hazard that has the potential of causing death or serious personal injury. (D002) 2. Locate the IBM Systems Safety Notices with the user publications that were provided with your system hardware.
  • Page 18 The following notices and statements are used in IBM documents. They are listed in order of decreasing severity of potential hazards. Danger notice definition A special note that emphasizes a situation that is potentially lethal or extremely hazardous to people.
  • Page 19 Hazardous voltage present. Voltages present constitute a shock hazard, which can cause severe injury or death. (L004) DANGER: Hazardous energy present. Voltages with hazardous energy might cause heating when shorted with metal, which might result in splattered metal, burns, or both. (L005) DANGER: Observe the following precautions when working on or around your IT rack system: •...
  • Page 20 DANGER: Do not transport the rack via fork truck unless it is properly packaged, secured on top of the supplied pallet. (R004) DANGER: Main Protective Earth (Ground): This symbol is marked on the frame of the rack. 6 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 21 CAUTION: To avoid personal injury, before lifting this unit, remove all appropriate subassemblies per instructions to reduce the system weight. (C012) CAUTION: CAUTION regarding IBM provided VENDOR LIFT TOOL: • Operation of LIFT TOOL by authorized personnel only • LIFT TOOL intended for use to assist, lift, install, remove units (load) up into rack elevations. It is not to be used loaded transporting over major ramps nor as a replacement for such designated tools like pallet jacks, walkies, fork trucks and such related relocation practices.
  • Page 22: Special Caution And Safety Notices

    4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the muscles in your back. Do not attempt to lift any objects that weigh more than 18 kg (40 lb) or objects that you think are too heavy for you. 8 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 23 Important: Good judgment must also be used to identify potential safety hazards due to the attachment of non-IBM features or options that are not covered by this inspection guide. If any unsafe conditions are present, you must determine how serious the apparent hazard might be and whether you can continue without first correcting the problem.
  • Page 24 To conduct the internal device check, use the following steps. 1. Check for any non-IBM changes that were made to the device. 2. Check the condition of the inside of the device for any metal or other contaminants, or any indications of water, other fluid, fire, or smoke damage.
  • Page 25: Environmental Notices

    Attention: Depending on local conditions, the sound pressure can exceed 85 dB(A) during service operations. In such cases, wear appropriate hearing protection. Environmental notices This information contains all the required environmental notices for IBM Systems products in English and other languages. The IBM Systems Environmental Notices includes statements on limitations, product information, product recycling and disposal, battery information, flat panel display, refrigeration and water-cooling systems, external power supplies, and safety data sheets.
  • Page 26: Japan Electronics And Information Technology Industries Association (Jeita) Notice

    This statement applies to products less than or equal to 20 A per phase. This statement applies to products greater than 20 A, single phase. This statement applies to products greater than 20 A per phase, three-phase. 12 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 27: Japan Voluntary Control Council For Interference (Vcci) Notice

    Japan Voluntary Control Council for Interference (VCCI) Notice Korea Notice People's Republic of China Notice Russia Notice Chapter 1. Notices 13...
  • Page 28: Taiwan Notice

    Properly shielded and grounded cables and connectors must be used in order to meet FCC emission limits. IBM is not responsible for any radio or television interference caused by using other than recommended cables and connectors, or by unauthorized changes or modifications to this equipment.
  • Page 29: Chapter 2. Weight Considerations: Model 092 Expansion Enclosure

    Secondary expansion module 0.826 1.821 1.652 3.642 Fan module 0.890 1.962 3.560 7.848 Expansion canister 1.588 3.501 3.176 7.002 Cable management arm 1.373 3.027 1.373 3.027 (lower and upper arms) Top cover 3.720 8.201 3.720 8.201 © Copyright IBM Corp. 2020...
  • Page 30: Weight Of Expansion Enclosure Drives

    • Enclosure • Secondary expansion modules • Fascia (1U and 4U) • PSUs • Expansion canisters • Fan modules • Fan interface board • Display assembly • Drives • Cover 16 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 31 Table 4. Enclosure weight as FRUs are installed (continued) Enclosure assembly Approximate weight FRUs installed FRUs not installed 44.3 97.7 • Enclosure • Fascia (1U and 4U) • Secondary expansion modules • PSUs • Expansion canisters • Fan modules • Fan interface board •...
  • Page 32 18 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 33: Chapter 3. System Overview

    Chapter 3. System overview IBM Elastic Storage System 5000 Expansion – Model 092 is an expansion enclosure. This Model 092 is a high capacity and density expansion enclosure, which is designed for use in cloud and enterprise environments. It holds up to 92 3.5-inch SAS disk drives in a 5U, 19-inch rack mount enclosure. The integral cable management arm (CMA) allows the enclosure to be withdrawn from the rack for servicing, while remaining connected and powered.
  • Page 34 Figure 2. ESS 5000 with Model 092 expansion enclosure Figure 3 on page 21 shows the rear view of a Model 092 expansion enclosure. 20 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 35: Model 092 Expansion Enclosure Rear View

    Figure 3. Model 092 expansion enclosure rear view Figure 4 on page 21 shows the disk locations in the Model 092 expansion enclosure. Figure 4. Drive locations of Model 092 expansion enclosure Chapter 3. System overview 21...
  • Page 36 22 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 37: Chapter 4. Planning For Hardware

    For detailed rack specification information on the 7965-S42 rack, see Planning for the 7965-S42 rack. If you do not have a 7965-S42 rack and want to install the system into a non-IBM rack, see “Model 092 expansion enclosure requirements” on page 26. Ensure that the physical environment meets the specified requirements, such as rack space, power, and environmental conditions.
  • Page 38: Reviewing Model 092 Expansion Enclosure Location Guidelines

    Consult these guidelines when you plan the location of Model 092 expansion enclosure and any existing Elastic Storage System in your environment, including any IBM Spectrum Scale client or protocol node. Each ESS 5000 cluster consists of the following components: •...
  • Page 39: Physical Installation Planning

    Supported hosts IBM Spectrum Scale needs to be installed on the host server before it is connected to ESS 5000. IBM Spectrum Scale provides the high-performance scale-out clustering capabilities. For a list of supported host type and OS, see the IBM Spectrum Scale Frequently Asked Questions.
  • Page 40: Model 092 Expansion Enclosure Requirements

    Attempting to move the drawer partially or completely out of the rack might cause the rack to become unstable or cause the drawer to fall out of the rack. (R001 part 2 of 2) Important: In addition, remember: 26 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 41 If there is less airflow, additional mechanisms are required to cool the enclosure. An appropriate IBM rack configuration would be the 7014-T42 IBM Rack Model T42, with standard rear door and feature code 6069 Front Door For 2.0 Meter Rack (High Perforation).
  • Page 42 – Decrease the maximum air temperature by 1 degree C per 300 m above 950 m. • The maximum ambient operating temperature when using an optical cable or discrete optical transceiver is 32C, which includes all Ethernet (100Gb) cables and InfiniBand (100Gb EDR) that are 28 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 43 Fully Enclosure Height Width Depth (without configured drive (with drive modules) modules) IBM Elastic Storage System 87 mm 483 mm 850 mm 44.85 kg 49.65 kg 5000 Expansion – Model 092 (3.46 in.) (19.0 in.) (33.5 in.) (98.87 lb) (109.46 lb)
  • Page 44: Service Clearance Requirements

    Ensure that these additional space requirements, as shown in Table 12 on page 30, are available around the enclosures. Table 12. Clearances Location Additional space requirements Reason Left and right sides 50 mm (2 in.) Cooling air flow Back Minimum: 100 mm (4 in.) Cable exit 30 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 45: Acoustical Noise Emissions

    Table 13 on page 31 provides drive specifications for your system. Table 13. Drive specifications Model and type 3.5-inch drives IBM Elastic Storage System 5000 Expansion – 92 SAS drives (6 TB, 10 TB, 14 TB, 16 TB) Model 092 with 92 3.5-inch drive slots Acoustical noise emissions Table 14 on page 31 provides the acoustical specifications for the Model 092 expansion enclosure.
  • Page 46 IBM recommends that you consult with qualified experts in this field to determine whether you are in compliance with the applicable regulations.
  • Page 47: Ip Address Allocation And Usage

    Plan to provide the network infrastructure and the storage network infrastructure that your system requires. You need to use only supported switches, cables, and other network components. See the IBM support website for specific firmware levels and the latest supported hardware.
  • Page 48: Model 092 Expansion Enclosure Iom Ports

    Up to seven Model 092 expansion enclosures can be attached to an ESS 5000 building block. Figure 8 on page 35 shows the front (left) and rear (right) view of the I/O server nodes and Model 092 expansion enclosures. 34 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 49: Front And Rear View Of I/O Servers And Model 092 Expansion Enclosures

    Figure 8. Front and rear view of I/O servers and Model 092 expansion enclosures Figure 9 on page 35 shows each I/O server node that is preinstalled with five 12 Gbps SAS host bus adapters in slots C2, C6, C7, C8, and C12. Figure 9.
  • Page 50 Figure 10. Location of SAS host bus adapters Figure 11 on page 37 shows cable connectivity from I/O server nodes to the Model 092 expansion enclosure. 36 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 51 Figure 11. Cable connectivity from I/O servers Chapter 4. Planning for hardware 37...
  • Page 52: Supported Environment

    Supported environment Refer to the IBM support website for up-to-date information about the supported environment for your system. Environmental topics can include updates about the following items: • Host attachments • Physical disk storage systems • Host bus adapters • Switches •...
  • Page 53: Chapter 5. Installing Model 092 Expansion Enclosure

    The Model 092 expansion enclosure and most parts are shipped together in one large box. A tray on the top of the enclosure contains the front fascia (1U and 4U pieces), the cable management arm (CMA), and © Copyright IBM Corp. 2020...
  • Page 54 3. Cut the corners of the shipping box and fold them down to uncover the sides and faces of the expansion enclosure, as shown in Figure 13 on page 40. Figure 13. Packaging materials Enclosure Top of shipping box, folded back. Foam protectors 40 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 55 8. Attach the remaining sections of the support rails to the rack. For more information, see step “6” on page 46 in “Installing or replacing the support rails (IBM SSR task)” on page 45. 9. Move the mechanical lift to the front of the rack. Align the inner section of the rails with the mid- section of the rails that are extending from the rack.
  • Page 56: External Parts Of The Model 092 Expansion Enclosure

    However, as Figure 16 on page 42 shows, the 4U fascia and the 1U fascia are packaged separately. You must attach them to the front of the Model 092 expansion enclosure as part of the initial installation process. Figure 16. Front fascia of the Model 092 expansion enclosure 42 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 57: Features On The Rear Of The Model 092 Expansion Enclosure

    Components on the rear of the enclosure Figure 17 on page 43 shows the components on the rear of the Model 092 expansion enclosure. Four fan modules and two expansion enclosures are accessible from the back of the enclosure. Figure 17. Features on the rear of the Model 092 expansion enclosure Power cable connector for PSU 2 Power cable retention clamps Fan module...
  • Page 58: Removing The Top Cover

    2. Slide the cover toward the front of the expansion enclosure ( ), as shown in Figure 20 on page 44. 3. Carefully lift the cover up, as shown in Figure 21 on page 45. 44 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 59: Installing Or Replacing The Support Rails (Ibm Ssr Task)

    Figure 21. Removing the Model 092 enclosure cover 4. Place the cover in a safe location. Installing or replacing the support rails (IBM SSR task) You must install the support rails before you can install a Model 092 expansion enclosure in a rack.
  • Page 60 Figure 25. Attaching the inner rail section to the enclosure 6. Use the M5 screws to install the outer rail member and bracket assembly to the rack, as shown in Figure 26 on page 47. 46 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 61 Figure 26. Installing the rail assembly to the rack frame For example, Figure 27 on page 47 shows the front of the rail that is attached to the frame. Figure 27. Example of the required rack space 7. Repeat steps “5” on page 46 through “6” on page 46 to install the opposite rail. 8.
  • Page 62: Installing Or Replacing The Fascia

    Align the tab on each side of the 1U fascia with the corresponding slots on the enclosure flange. Pins on each flange must also align with a hole in each side of the 1U fascia. 48 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 63: Installing Or Replacing A Drive

    • Disk maintenance can also be performed by using the mmvdisk pdisk replace command with the --prepare option to inform IBM Spectrum Scale to locate the disk, suspend it, and allow it to be removed. Locate and remove the failed disk, and replace it with a new disk.
  • Page 64 Note: In an ESS building block, only the primary enclosure has two SSDs. See Figure 31 on page 51 where SSDs are placed at locations 1 and 14. All other non-primary enclosures have only HDDs at all locations. 50 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 65 In the first Model 092 expansion enclosure slots, 1 and 14 contain SSDs for the LogTip backup. For more information about the LogTip backup, see IBM Spectrum Scale RAID guide. In Figure 33 on page 52, the drives are not installed correctly. Slot 1 (A1) does not contain a drive.
  • Page 66 5. Ensure that the drive handle ( in Figure 34 on page 53) of the drive assembly is in the open (unlocked) position. 6. Align the drive carrier into the appropriate drive slot. 52 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 67 Figure 34. Replace the drive 7. Gently push the drive down until it stops, and the bottom of the latch is aligned with the top of the partition. Ensure that the handle is not open more than 45 degrees from the drive carrier. ( Figure 34 on page 53).
  • Page 68: Installing Or Replacing The Top Cover

    4. Verify that the cover correctly engages the cover release latch and all of the inset tabs on the expansion enclosure. 5. Lock the cover into position by sliding the release lever , as shown in Figure 37 on page 55 54 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 69: Installing Or Replacing A Model 092 Expansion Enclosure In A Rack

    Figure 37. Locking the top cover Installing or replacing a Model 092 expansion enclosure in a rack Use the following procedure to place an expansion enclosure in a rack during the installation process. To complete some service tasks, you might also need to slide the enclosure back in to the rack. Important: The Model 092 expansion enclosure is heavy.
  • Page 70: Installing Or Replacing The Cable Management Arms

    CMA with a CMA from the FRU stock. The cable management arm (CMA) consists of an upper arm and a lower arm assembly, as Figure 40 on page 57 shows. 56 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 71 Figure 40. Upper and lower cable management arms As Figure 41 on page 57 shows, the support rail connectors of each CMA assembly are installed on the rail hooks at the end of the support rails. Figure 41. Upper and lower cable management arms 1.
  • Page 72 4. Attach the support rail connector on the upper CMA assembly ( ) to the connector base on the right support rail ( ), as shown in Figure 45 on page 59. 58 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 73 Figure 45. Attach the support rail connector of the upper CMA to the right support rail Ensure the cable management arm connector attaches securely to the hooks on the rails. Installing the lower CMA assembly Note: The procedure for attaching the lower CMA assembly is the same as the procedure to attach the upper CMA assembly.
  • Page 74: Removing And Installing A Sas Cable

    6. Insert the SAS cable into the SAS port until you hear or feel a click. When the cable is successfully inserted, you cannot disconnect the cable without pulling on the blue tag. Connecting to an I/O server node 60 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 75 7. Connect the SAS cable to the SAS port with blue tab above the connector (that is, facing towards the top of the node). You hear or feel a click when the cable is successfully inserted. You cannot disconnect the cable without pulling on the blue tag.
  • Page 76: Connecting The Model 092 Expansion Enclosures

    Figure 51 on page 62). As the figure also shows, the PSUs are covered by the 1U fascia ( Figure 51. Features on the front of the Model 092 expansion enclosure 62 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 77 Display panel LEDs Rack retention thumb screws Power supply unit LEDs Power supply units (PSUs) PSU fascia (1U) Front fascia (4U) Each PSU has a power supply connector and power cable, which are accessible from the back of the enclosure. Power is provided by plugging a C19-C20 power cable into each power supply unit and, if necessary, turning on the power source.
  • Page 78: Features On The Rear Of The Model 092 Expansion Enclosure

    In both I/O server nodes of the building block, start essutils in the I/O server node and select SSR Tools -> Check the enclosure cabling and paths to disks. b. Review the output and take any corrective action needed. 64 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 79: Powering Off The Model 092 Expansion Enclosure

    3. Wait 5 minutes for all write data to be flushed to the drives. 4. Stop IBM Spectrum Scale RAID in both I/O servers of the building block. 5. To remove all power from the enclosure, unplug both power cords from the rear of the expansion enclosure.
  • Page 80: Leds On The Front Of The Expansion Enclosure

    Figure 55 on page 66) that are accessible from the front of the enclosure. Each PSU has its own a set of LEDs, as shown in Figure 56 on page 67. 66 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 81: Leds On The Front Of A Power Supply Unit

    Figure 56. LEDs on the front of a power supply unit Input power DC power Fault indicator Table 19 on page 67 explains the function and status that is indicated by each of the LEDs. The power cords for each PSU are accessible from the rear of the expansion enclosure ( ), as shown in Figure 59 on page 69.
  • Page 82: Led Indicators On Drives

    Figure 59 on page 69 shows the rear view of a Model 092 expansion enclosure. LEDs on the rear of the enclosure provide information about each fan module, each expansion canister, and SAS links. 68 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 83: Leds On The Back Of The Expansion Enclosure

    Figure 59. LEDs on the back of the expansion enclosure The expansion enclosure has four fans. Each fan has one LED; for example, Figure 59 on page 69 shows the location of the LED ( ) for fan number four. When a fan is operating normally, the LED is not lit. If a fault is detected, the amber LED is lit.
  • Page 84 SAS link Green No link connection on any lane. The operational connection is down. The SAS link is active. At least one of the four lanes is connected. 70 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 85: Chapter 6. Servicing

    Chapter 6. Servicing Service information is intended for IBM authorized service personnel only. Consult the terms of your warranty to determine the extent to which you can attempt to accomplish any IBM ESS 5000 system maintenance. IBM service support representatives and lab-based services personnel can access service information...
  • Page 86 72 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 87: Chapter 7. Planning Worksheets (Customer Task)

    Chapter 7. Planning worksheets (customer task) Customers are responsible for completing the system planning worksheets. The customer then provides the worksheets to the IBM SSR when they install and configure the system. Completing the hardware location chart Planning for the physical location of the system hardware includes documenting the rack locations of the enclosures and other devices.
  • Page 88 Table 24. Enclosure models and rack requirements Device Machine type and model Number of EIA units Notes required Model 092 expansion 5147-092 92 3.5-inch drive slots; enclosure dual power supplies 74 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 89: Accessibility Features For The System

    IBM Knowledge Center (www.ibm.com/support/knowledgecenter). Keyboard navigation This product uses standard Microsoft Windows navigation keys. IBM and accessibility See the IBM Human Ability and Accessibility Center (www.ibm.com/able) for more information about the commitment that IBM has to accessibility. © Copyright IBM Corp. 2020...
  • Page 90 76 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 91: Glossary

    • See refers you from a non-preferred term to the preferred term or from an abbreviation to the spelled- out form. • See also refers you to a related or contrasting term. For other terms and definitions, see the IBM Terminology website (opens in new window): http://www.ibm.com/software/globalization/terminology building block A pair of servers with shared disk enclosures attached.
  • Page 92 See also cluster. (3) The routing of all transactions to a second controller when the first controller fails. See also cluster. failure group A collection of disks that share common access paths or adapter connection, and could all become unavailable through a single hardware failure. 78 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 93 See file encryption key (FEK). file encryption key (FEK) A key used to encrypt sectors of an individual file. See also encryption key. file system The methods and data structures used to control how data is stored and retrieved. file system descriptor A data structure containing key information about a file system.
  • Page 94 (LPAR) A subset of a server's hardware resources virtualized as a separate computer, each with its own operating system. See also node. LPAR See logical partition (LPAR). 80 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 95 management network A network that is primarily responsible for booting and installing the designated server and compute nodes from the management server. management server (MS) An ESS node that hosts the ESS GUI and xCAT and is not connected to storage. It must be part of a GPFS cluster.
  • Page 96 RKM server See remote key management server (RKM server). See Serial Attached SCSI (SAS). secure shell (SSH) A cryptographic (encrypted) network protocol for initiating text-based shell sessions securely on remote computers. 82 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 97 Serial Attached SCSI (SAS) A point-to-point serial protocol that moves data to and from such computer storage devices as hard drives and tape drives. service network ® A private network that is dedicated to managing POWER8 servers. Provides Ethernet-based connectivity among the FSP, CPC, HMC, and management server. See symmetric multiprocessing (SMP).
  • Page 98 84 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 99: Index

    Index accessibility features 75 overview audience xi of information xi comments xiii planning high availability 33 Console power user interfaces 25 requirements system 27 preface xi documentation on web xii drive requirements requirements 31 additional space 30 drives 31 electrical 27 environmental 28 power 27 Elastic Storage System 3000...
  • Page 100 86 IBM Elastic Storage System 5000: Model 092 Hardware Guide...
  • Page 102 IBM® Product Number: 5765-DME 5765-DAE SC28-3135-00...

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